U.S. patent number 6,532,148 [Application Number 09/738,283] was granted by the patent office on 2003-03-11 for mechanism for attaching accessory devices to handheld computers.
This patent grant is currently assigned to Palm, Inc.. Invention is credited to Troy Hulick, Kenneth A. Jenks.
United States Patent |
6,532,148 |
Jenks , et al. |
March 11, 2003 |
Mechanism for attaching accessory devices to handheld computers
Abstract
An attachment mechanism is provided to couple an accessory
device with a handheld computer. The attachment mechanism includes
a spine adapted to detachably couple to an accessory slot of the
handheld computer. The spine includes a deformable layer that
deforms as the spine inserts into the accessory slot. The
deformable layer expands within the accessory slot to couple the
accessory device to the handheld computer.
Inventors: |
Jenks; Kenneth A. (Capitola,
CA), Hulick; Troy (Saratoga, CA) |
Assignee: |
Palm, Inc. (Santa Clara,
CA)
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Family
ID: |
46257318 |
Appl.
No.: |
09/738,283 |
Filed: |
December 14, 2000 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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502169 |
Feb 11, 2000 |
6266240 |
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451630 |
Nov 30, 1999 |
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Current U.S.
Class: |
361/679.56;
343/702 |
Current CPC
Class: |
G06F
1/1626 (20130101); G06F 1/1632 (20130101); G06F
1/1698 (20130101); G06F 3/03545 (20130101); G06F
2200/1632 (20130101); G06F 2200/1633 (20130101); G06F
2200/1634 (20130101) |
Current International
Class: |
G06F
1/16 (20060101); G06F 3/033 (20060101); G06F
001/16 () |
Field of
Search: |
;361/679-683,686,727,755,741 ;206/320,576,38,214,232,472,471
;220/581,836,843,845,848,811,813,815,4.22
;16/319,284,292,317,297,223,235 ;402/4,4.01,70,79,502
;345/179,180,173 ;455/90,575 ;343/702,720 |
References Cited
[Referenced By]
U.S. Patent Documents
Other References
Gray, R. et al., "Efficient MC68HC08 programming: reducing cycle
count and improving code density", Dr. Dobb's Journal, vol. 20, No.
5, May 1995, pp. 70-75. .
Ruley, J. et al., "Handheld-to-Handheld Combat", Windows Magazine,
No. 811, p. 55, Nov. 1997. .
Dayton, D., "FRx extends reporting power of Platinum Series", PC
Week, vol. 8, No. 5, p. 29(2), Feb. 1991. .
Forbes, J. et al., "Palm PCs get a Big Hand (What's Hot)", Windows
Magazine, No. 905, p. 96, May 1998. .
Penwarden, M., "More Muscle for HP's OmniBook", Windows Magazine,
No. 501, p. 110, Jan. 1994. .
Feigel, C., "IBM, Motorola preview embedded PowerPCs; 403 and 405
processors combine strong performance with low cost",
Microprocessor Report, vol. 8, No. 6, pp. 1-5, May 1994..
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Primary Examiner: Schuberg; Darren
Assistant Examiner: Datskovsky; Michael
Attorney, Agent or Firm: Mahamedi; Van Hickman Palermo
Truong & Becker LLP
Parent Case Text
RELATED APPLICATIONS
The application is a continuation-in-part of application Ser. No.
09/502,169, filed Feb. 11, 2000, now U.S. Pat. No. 6,266,240
entitled "Encasement For a Handheld Computer"; application Ser. No.
09/451,630, filed Nov. 30, 1999, entitled "Cover For A Handheld
Computer"; both of the above-cited applications being hereby
incorporated by reference.
Claims
What is claimed is:
1. An attachment mechanism for coupling an external device to a
handheld computer, the attachment mechanism comprising: a spine
adapted to detachably couple to a slot of the handheld computer,
the spine including a deformable layer that deforms to enable the
spine to insert and be retained within the slot.
2. The attachment mechanism of claim 1, wherein the deformable
layer inserts to be biasely retained within the slot.
3. The attachment mechanism of claim 1, wherein the spine comprises
a core member that is clad by the deformable layer.
4. The attachment mechanism of claim 3, wherein the core member is
flexible about a length of the rigid member.
5. The attachment mechanism of claim 1, further comprising an
enlarged end piece extending from the spine.
6. The attachment mechanism of claim 5, wherein the enlarged end
piece is formed from a molded material.
7. The attachment mechanism of claim 1, wherein the deformable
layer is configured to deform in a first direction, the first
direction being orthanormal to a second direction corresponding to
a length of the spine.
8. The attachment mechanism of claim 7, wherein the spine includes
a thickness measured along the first direction, the thickness being
sufficient to include an extension extending to a body of the
attachment mechanism.
9. The attachment mechanism of claim 8, wherein the spine is
oriented to engage the slot in the second direction.
10. An external device for a handheld computer, the external device
comprising: a spine adapted to detachably couple to a slot of the
handheld computer, the spine including a deformable layer that
deforms to insert into the slot so as to couple the external device
to the handheld computer; and a body that extends from the
spine.
11. The external device of claim 10, wherein the body includes: a
flex member extending from the spine; and a cover portion extending
from the flex member.
12. The external device of claim 11, wherein the cover portion is
dimensioned to cover a display of the handheld computer when the
spine is coupled to the handheld computer.
13. The external device of claim 11, wherein the spine includes a
core member, wherein the deformable layer is formed over the core
member.
14. The external device of claim 13, wherein the core member is
formed from a metal, and is flexible about a length of the core
member.
15. The external device of claim 14, wherein the cover portion is
formed from a tensile material.
16. The external device of claim 15, wherein the cover portion is
formed from a leather material.
17. The external device of claim 15, wherein the cover portion is
formed from a fabric.
18. The external device of claim 14, wherein the cover portion is
formed from a material selected from metal, plastic, vinyl, and
rubber.
19. The external device of claim 14, wherein the cover is formed
from neoprene.
20. The external device of claim 14, wherein the cover portion is
formed from a rigid material.
21. The external device of claim 10, wherein the deformable layer
is dimensioned so that at least a portion of the deformable layer
relaxes within the slot when the spine is inserted into the
slot.
22. A detachable assembly comprising: a handheld computer including
a front face, a back face opposing the front face, a top and a
bottom, first lateral side and a second lateral side, the handheld
computer including a display positioned to be accessible from the
front face and extending between the top and bottom, and an
accessory slot extending lengthwise on or adjacent to the first
lateral sides; and an external device including a spine that
engages the accessory slot to couple the external device to the
handheld computer, the spine including a deformable layer that
deforms to enable the spine to insert and be retained within the
accessory slot.
23. The detachable assembly of claim 22, wherein the deformable
layer deforms to enable the spine to be biasely retained within the
accessory slot.
24. The detachable assembly of claim 22, wherein the accessory slot
extends along a portion of a length of the handheld computer.
25. The detachable assembly of claim 22, wherein the deformable
layer is formed from leather.
26. The detachable assembly of claim 22, wherein the spine includes
a bottom end piece and a top end piece, the top end piece being
enlarged relative to the bottom end piece, and wherein the spine
further includes a member extending between the bottom end piece
and the top end piece, the member including the deformable
layer.
27. The detachable assembly of claim 26, wherein the member
includes a core that is clad by the deformable layer.
28. The detachable assembly of claim 26, wherein the core is shaped
so that a width of the core is greater than a thickness of the
core, wherein the width of the core member is oriented to extend
inward into the handheld computer when the external device couples
to the spine.
29. The detachable assembly of claim 26, wherein the accessory slot
includes an entrance recess positioned on the lateral side a
distance away from the top of the handheld computer, the entrance
recess being shaped to receive the spine from an end of the spine
first.
30. The detachable assembly of claim 29, wherein the spine is
insertable into the accessory slot from the bottom end piece, and
the top end piece positions at least partially in the entrance
recess when the spine is inserted into the accessory slot.
31. The detachable assembly of claim 22, wherein the accessory slot
extends a depth into a casing of the handheld computer from the
first lateral side.
32. The detachable assembly of claim 31, wherein the handheld
computer further includes a second accessory slot positioned on or
adjacent to the second lateral side of the handheld computer.
33. The detachable assembly of claim 31, wherein the second
accessory slot includes an entrance opening that is engageable from
the top of the handheld computer.
34. The detachable assembly of claim 22, wherein the deformable
layer and accessory slot are each dimensioned so that at least a
portion of the deformable layer relaxes after being inserted into
the accessory slot.
35. An external device coupleable to a handheld computer, the
external device comprising: a spine dimensioned to be received
within a slot of a handheld computer, a deformable layer retained
on at least a portion the spine, the deformable layer deforming
when the spine is inserted into the slot of the handheld computer
to retain at least a portion of the spine within the slot.
36. The external device of claim 35, wherein the deformable layer
extends a majority of a length of the spine.
37. The external device of claim 25, further comprising a body
extending from the spine to be moveable over a display of the
handheld computer when the spine is inserted into the slot of the
handheld computer.
38. An external device coupleable to a handheld computer, the
external device comprising: a spine dimensioned to be received
within a slot of a handheld computer, and a frictional contact
surface formed continuously on at least a majority of the spine;
wherein the spine is dimensioned to slide within the slot of the
handheld computer with the frictional contact surface contacting an
interior surface of the slot so as to resist withdrawal of the
spine from the slot.
39. The external device of claim 38, further comprising a body
extending from the spine to be moveable over a display of the
handheld computer when the spine is inserted into the slot of the
handheld computer.
40. The external device of claim 38, wherein the spine has a
rectangular cross-section.
41. The external device of claim 39, wherein the spine and the body
form a T-shaped cross-section.
42. The external device of claim 38, wherein the frictional contact
surface is deformable.
43. A stylus for use with a handheld computer, the stylus
comprising: an elongated member having a length and a
cross-section, the elongated member being dimensioned to engage and
be received within a slot of the handheld computer; a core of the
elongated member extending a majority of the length and forming
part of the cross-section; and a deformable layer formed
continuously about the core along the majority of the length of the
elongated members the deformable layer deforming when the stylus
engages the slot to retain the stylus within the slot.
Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
This invention relates to the field of accessory devices for
handheld computers. In particular, the invention relates to
attachment mechanism for such accessory devices.
2. Description of the Related Art
Handheld computers may include slots for receiving stylus and/or
accessory devices. The slots may be used for carrying styluses that
can be used to operate the handheld computers. In some handheld
computers, the slots may double for purpose of receiving accessory
devices.
The slots sometimes enable the spine or stylus being retained
therein to jiggle or move about. The accessory devices and stylus
may become detached from the handheld computer as a result of the
spacing within the accessory device.
Furthermore, some handheld computers require accessory devices,
stylus and other peripherals to be inserted into slots for
retention. When these devices are inserted into handheld computers,
the movement of the devices along the longitudinal axis of the
slots may cause the devices to inadvertently jog free of the
handheld computer. For example, styluses and other devices may fall
from the handheld computer if the handheld computer is held upside
down or dropped.
SUMMARY OF THE INVENTION
Embodiments of the invention provide an attachment mechanism for
coupling an external device to a handheld computer. In one
embodiment, an external device is equipped with a spine having a
deformable layer. The spine is inserted into a device slot of the
handheld computer. The deformable layer deforms to enable the
handheld computer and accessory device to detachable couple to one
another.
In one embodiment, an external device includes a spine having a
frictional surface. The spine may be inserted into a slot of the
handheld computer so as to bind the frictional surface of the spine
to a corresponding surface of the handheld computer.
In another embodiment, a spine of an external device includes a
T-shaped cross-section to increase the retention force of the spine
within the slot of the handheld computer.
In another embodiment, a handheld computer is provided with a slot
for receiving a spine of an external device. The slot may be
configured to receive a spine having a rectangular
cross-section.
In another embodiment, the slot is configured to receive a flexible
spine that can be bent for entrance into the slot. The slot
includes an interior structure to receive the spine while
supporting the spine from yielding.
In still another embodiment, the slot may be laterally positioned
on a surface of the handheld computer and configured to cause a
bendable spine to bias as it is inserted into the slot. The bias of
the spine is directed towards moving the spine laterally against
the handheld computer concurrently with the spine being moved into
the slot.
BRIEF DESCRIPTION OF THE FIGURES
FIG. 1 is a frontal view of an accessory device including an
attachment mechanism, under an embodiment of the invention.
FIG. 2 is a frontal view of a detachable assembly, including a
handheld computer and an accessory device, under an embodiment of
the invention.
FIG. 3 is a frontal view of a handheld computer with a cover of the
accessory device extending over a front face, under an embodiment
of the invention.
FIG. 4 is a rear view of the handheld computer with the cover of
the accessory device extending over a rear face, under an
embodiment of the invention.
FIG. 5 is a side view of a handheld computer for use with an
accessory device, under an embodiment of the invention.
FIG. 6 is a frontal view of a handheld computer incorporating a
device slot, under an embodiment of the invention.
FIG. 7 is a side view of a spine for an accessory device, under an
embodiment of the invention.
FIG. 8 is a frontal view of the spine, under an embodiment of the
invention.
FIG. 9 is an isometric close-up of an end piece for the spine,
under an embodiment of the invention.
FIG. 10 is a cross-section of a spine, under an embodiment of the
invention.
FIG. 11 is a side-sectional view of the handheld computer retaining
a spine of an accessory device, under an embodiment of the
invention.
FIG. 12 is a side-sectional view of the handheld computer receiving
the spine, under an embodiment of the invention.
FIG. 13 is a top sectional view a handheld computer with a device
slot retaining a spine having a rectangular cross-section, under an
embodiment of the invention, compared with a circular device slot
used in known devices.
DETAILED DESCRIPTION
A. Overview
Embodiments of the invention include an attachment mechanism for
coupling an external device to a handheld computer. The external
device may include an elongated member or spine that can deform to
insert and be retained within a slot of a handheld computer. The
deformable layer ensures a snug and secure fit. The spine is
removable from the slot of the handheld computer. The spine and
deformable layer may be integrated or coupled with an accessory
device, peripheral device, or stylus that is coupleable with the
handheld computer.
An embodiment of the invention includes an attachment mechanism for
coupling an external device to a handheld computer. The attachment
mechanism includes an elongated member having a deformable layer.
The elongated member engages a slot on the handheld computer to
detachably couple the external device to the handheld computer. The
deformable layer deforms to enable the elongated member to insert
and be retained within the slot of the handheld computer.
The term deformable as used herein refers to a characteristic of a
member that allows a cross-section of the member to be measurably
reduced with a compressive force. Under an embodiment of the
invention, a deformable layer compresses to reduce its
cross-section by at least 1%.
As used herein, an external device includes a stylus, a peripheral
device or an accessory device. An accessory device is an item that
adds functionality to the handheld computer. The slot on the
handheld computer may include device slots, rails, or openings. The
slot may double for receiving an accessory device or a stylus.
One advantage provided under an embodiment of the invention is that
an external device coupled to the handheld computer is precluded or
resisted from moving longitudinally with the slot of the handheld
computer. This feature may be provided by frictional layers on the
portion of the external device being inserted into the handheld
computer. The feature may also be provided by the structure of the
slot on the handheld computer, in a manner described below. The
limited longitudinal movement of the external device provides a
more secure, detachable coupling.
In another embodiment, a handheld computer includes a housing
having a front face and a back face, a top surface and a bottom
surface defining a first axis, and a first side and a second
lateral side defining a second axis. A display is provided on the
front face. The housing retains an antenna element, positioned
relative to the first axis to be between the display and the top
surface. A slot is configured to receive an elongated member. The
slot includes an entrance that extends towards the bottom surface.
The slot is positioned between the bottom surface and the antenna
element along the first axis.
In such embodiments, the handheld computer may be employed to carry
out wireless communications, while including a slot for coupling
with other devices. The slot configuration reduces the overall size
of the handheld computer, when compared to handheld computers using
stylus-shaped device slots.
Another embodiment of the invention includes a handheld computer
including a housing. A slot is formed into the housing to receive
an elongated external device. The slot is positioned so that the
elongated device has to bend to be inserted into the housing. The
slot may include an internal structure that supports the elongated
device from yielding when it is being inserted.
The resulting handheld computer is equipped to retain a spine or
elongated member of an external device in a more secure fashion
than other known handheld computers. In particular, such handheld
computers resist movement of the external devices with the slots.
As a result, the external device and handheld computer can be
detachable coupled in a more secure fashion.
B. External Device With Attachment Mechanism
FIG. 1 illustrates an accessory or other external device configured
to include an attachment mechanism, under an embodiment of the
invention. For examples provided, the attachment mechanism is
assumed to be a portion of an external device. In embodiments
described, the external device is assumed to be an accessory,
specifically a detachable cover for a handheld computer. Other
embodiments may vary the construction and function of the external
device. For example, the attachment mechanism may be used with a
housing for electrical components and circuitry. The housing of the
attached device may be shaped as a cover, or otherwise be
extendible over a surface of the handheld computer. Still further,
the attachment mechanism may be applicable to external devices such
as styluses.
In an embodiment, accessory device 100 includes a spine 105, a flex
portion 110, and a cover portion 120. The accessory device 100 is
shown oriented so that the cover portion 120 extends completely
over a display of the handheld computer when the two devices are
coupled.
The spine 105 is shaped to engage a device slot 212 (FIG. 5) of a
handheld computer 220 (FIG. 2). The spine 105 includes a bottom end
piece 106 and a top end piece 108. The top end piece 108 is
enlarged relative to the bottom end piece 106. A member 104 extends
between the bottom end piece 106 and the top end piece 108. As will
be further described, at least the member 104 of spine 105 is
deformable to facilitate accessory device 100 in detachable
coupling to handheld computer 220.
In an embodiment, cover portion 120 and flex portion 110 are each
formed from a tensile material. For example, the flex portion 110
and cover portion 120 may each be formed from leather, plastic,
vinyl, rubber, fabric or other suitable material. The flex portion
110 may be a unitary, integrated or attached extension of cover
portion 120. Flex portion 110 can be stitched or glued to cover
portion 120. Likewise, cover portion 120 may be formed as unitary,
integrated, or attached feature of spine 105, or of flex portion
110.
In an embodiment, member 104 includes a deformable material clad
around a rigid core. The rigid core may be pliable or able to flex
about its length. The deformable material is preferable leather,
rubber, or plastic. Other examples of deformable materials for the
member 104 include vinyl or fabric. Examples of materials used for
the core include metals such as aluminum, tin, or copper, although
any flexing rigid material may be suitable, such as for example,
wood. The bottom end piece 106 and top end piece 108 may be formed
from moldable materials, such as plastic.
FIG. 2 illustrates a detachable assembly 200, under an embodiment
of the invention. The detachable assembly includes a handheld
computer 220 that is detachably coupled to accessory device 100
through spine 105. The handheld computer 220 includes a front face
222, and a back face 242 (FIG. 4) opposing the front face. The
front face 222 spans between a top 227 and a bottom 229 of the
handheld computer 200. The front face 222 provides access to a
display 224, as well as a plurality of application buttons 226 and
a rocking switch 237. The handheld computer 220 also includes a
first lateral side 221 and a second lateral side 223. The first and
second lateral sides 221 and 223 extend between the front face 222
and the back face, as well as between the top 227 and bottom 229.
An antenna 230 is provided on or adjacent to the top 227 of the
handheld computer 200.
Examples of handheld computers for use with embodiments of the
invention include devices operating a Palm.RTM., Windows CE.RTM.,
or Windows PocketPC.RTM. device. Other examples include devices
equipped for use as cellular phones, wireless devices including
Wireless Access Protocol (WAP) enabled devices and wireless devices
using web-browsers. Specific examples of such devices include
PalmPilot.RTM., Palm III.RTM., Palm V.RTM., and Palm VII.RTM.
electronic organizers, manufactured by Palm Inc.
In the embodiment shown, accessory device 100 engages first device
slot 212 (See FIG. 5) positioned on or adjacent to the first
lateral side 221 of handheld computer 220. The handheld computer
220 includes a second device slot 232 (shown in phantom) positioned
on or adjacent to the second lateral side 223. The second device
slot 232 includes an entrance opening 237 for receiving an external
device from top 227. Preferably, second device slot 232 is
dimensioned differently than first device slot 212. In the example
shown, second device slot 232 is used to receive a stylus 240 or
stylus type device, which may be wider and/or longer than spine
105. The stylus 240 may also have a circular or elliptical
cross-section, while spine 105 may be provided a rectangular
cross-section. The second device slot 232 may even be used for
accessory devices that have stylus-type spines, having dimensions
different than spine 105.
When coupled, the cover portion 120 of accessory device 100
includes an inside surface 122 that can be positioned to overlay
and be immediately adjacent to the front face 222. The inside
surface 122 is moveable about the connection formed by spine 105
and first device slot 212 so to be positionable on front face 222.
Preferably, the cover portion 120 has dimensions that are
sufficient to at least cover display 224, and more preferably,
application buttons 226 and rocking switch 237. The inside surface
122 may include pockets and other interior features to maximize the
utility of the accessory device 100, as described U.S. patent
application Ser. No. 09/451,630 (hereby incorporated by reference).
In addition, cover portion 120 may house circuitry and electrical
components to form accessorial electrical and/or computational
functions, as described U.S. patent application Ser. No. 09/573,451
(hereby incorporated by reference).
FIG. 3 illustrates detachable assembly 200, with cover portion 120
of accessory device 100 positioned to be adjacent to front face 222
so as to extend over display 224. The cover portion 120 can be
rotated about the spine 105, and preferably includes sufficient
movement to flip from the front face 222 to the back face of the
handheld computer. In one embodiment, the freedom of motion is
provided by the flexibility and length of the flex portion 110. In
other embodiment, spine 105 may be configured to be rotatable about
first device slot 212 (FIG. 5).
FIG. 4 illustrates the accessory device 100 with the cover portion
120 flipped to be adjacent to a back face 242 of handheld computer
220. FIG. 4 illustrates that flex portion 110 (FIG. 1) may be used
as a hinge, enabling cover portion 120 to moved from being
positioned adjacent front face 222 (See FIG. 2) to being adjacent
to back face 242. A user of handheld computer 220 may flip the
cover to be adjacent to back face 242 in order to use the device,
such as by viewing display 224 (FIG. 3) or actuating applications
buttons 226 (FIG. 3).
In this way, the user may avoid detaching the accessory device 100
from handheld computer 220 to access display 224, application
buttons 220 or rocking switch 227.
C. Handheld Computer With Device Slot
FIG. 5 is a side view of handheld computer 220, illustrating first
device slot 212 positioned on a housing 260 of handheld computer to
receive spine 105 of accessory device 100. Preferably, first device
slot 212 is positioned on first lateral side 221, between the front
face 222 and back face 242 of handheld computer 220. In an
embodiment, first device slot 212 is shaped to slideably receive
spine 105 as it is inserted end-first in a lengthwise direction.
The device slot 212 is accessible to spine 105 through an entrance
234. The entrance 234 is merged with an elongated section 233
(shown in phantom). The elongated section 233 extends along a
subsection of the housing 260, and is shaped to receive member 104
and bottom end piece 106. The device slot 212 includes an exposed
length 262 extending with the elongated section 233. The exposed
length 262 provides a structure within device slot 212 access to
extend beyond housing 260. For accessory device 100, cover portion
120 may extend from spine 105 to cover a face of handheld computer
220 when spine 105 is inserted in first device slot 212.
In an embodiment, at least one cross-sectional dimension of the
elongated section 233 is sufficiently small to frictionally receive
the member 104, while another dimension of elongated section 233
may be sufficient to allow bottom end piece 106 to pass through.
The device slot 212 extends a depth into the casing of handheld
computer 220. The entrance 234 is preferably a recess formed into
the lateral side 221 of the handheld computer 220.
The entrance 234 of device slot 212 is positioned a distance x from
the top 227. The position of device slot 212 enables spine 105 to
be attached to handheld computer 220 without interfering with radio
frequency communications of handheld computer's antenna, in a
manner described with FIG. 6.
FIG. 6 is a frontal view of handheld computer 220, including first
device slot 212, under an embodiment of the invention. The front
face 222 of handheld computer 220 includes display 224. A driver
256 (shown in phantom) is positioned within the housing adjacent to
the display 224. Preferably, device slot 212 is positioned on or
proximate to first lateral side 221. The second lateral side 223
includes a second device slot 232, having an opening 237 for
receiving a stylus 240 (FIG. 2). Preferably, opening 237 is formed
on top 27.
For descriptive purposes, reference is made between a first axis z1
extending the length of handheld computer 220, defined to be
between top 227 and bottom 229. A second axis z2 extends the width
of handheld computer 220, defined to be between the first lateral
side 221 and the second lateral side 223.
The first device slot 212 extends a portion of the length along
axis z1. A first antenna element 266 is retained within housing 260
of the handheld computer 220. A second antenna element 268 may be
positioned on the top 227. The first antenna element 266 may be a
ceramic chip antenna for transmitting radio-frequency signals. The
antenna chip 266 is positioned along z1 to be between top 227 and
the entrance 234 to first device slot 212. Preferably, the antenna
element 266 is immediately adjacent to top 227.
In an embodiment, spine 105 (shown in FIG. 6 to be without a body)
is engageable with device slot 212 at an acute angle relative to
z1. Path C is intended to illustrate the path of a point on the
spine 105 as the spine 105 is engaged and retained by device slot
212. Preferably, the angle is less than thirty degrees. When spine
105 is engaged with device slot 212, the portion of spine 105 that
is still not inserted is acutely angled with the device slot 212,
creating a bend in spine 105. The spine 105 has sufficient flexure
properties to bend while being inserted. The flexure properties of
spine 105 create a bias that tends to direct the portion of the
spine outside of device slot 212 towards the housing 260.
When fully inserted, top end piece 108 of spine 105 is positioned
at entrance 234 of device slot 212, the distance x from top 227 of
handheld computer 220. The proximity of antenna chip 266 and spine
105 may be measured relative to a distance along axis z1. This
position of spine 105 avoids disruption to antenna element 266,
especially if spine 105 includes metallic or conductive materials.
In one embodiment, the proximity between second end piece 108 and
the top 227 is between 8-12 mm, and the proximity between spine 105
and antenna chip 266 is between 6-8 mm.
With some known devices, the driver 256 has space requirements that
preclude positioning the display 224 centrally about first axis z1.
In contrast, under an embodiment, device slot 212 occupies a
smaller foot-print on the surface of handheld computer 220. This
allows device slot 212 to be positioned, between first lateral side
221 and display 224 relative to second axis z2. The driver 256 may
then be positioned between the display 224 and the second lateral
side 223, relative to second axis z2. This configuration enables
handheld computer 220 to be symmetrical on front face 222. In
particular, display 224 is centrally positioned relative to second
axis z2. In other words, the lateral distance b measured between
each side of display 224 and the proximate lateral side 221, 223 is
about the same (preferably within 0.1 mm).
D. Attachment Mechanism
FIG. 7 is a side view of spine 105, corresponding to the
perspective of FIG. 5 for device slot 212. The member 104 includes
bottom end piece 106 and top end piece 108. The top end piece 108
is enlarged compared to bottom end piece 106. The top end piece 108
is shaped to be received and retained by entrance 234 of handheld
computer 220. The dimension of top end piece 108 shown with FIG. 7
is too large to be able to pass through entrance 234. Thus, top end
piece 108 rests in the entrance opening 134 and provides a catching
point for users to remove spine 105 from the first device slot
212.
The dimension of bottom end piece 106 shown by FIG. 7 is thinner
than top end piece 108, and sufficient to pass through first device
slot 212. The bottom end piece 106 can then be forced down towards
the bottom 229 of handheld computer 220 with member 104 sliding
into position within first device slot 212. The top end piece 108
precludes further motion of the spine 105 when it is received in
entrance 234. The first device slot 212 and spine 105 may also be
dimensioned so that spine end piece 106 is obstructed from further
downward movement when spine 105 is fully inserted. The member 104
of spine 105 includes a dimension represented by thickness t. In an
embodiment, spine 105 is clad with a deformable layer 118 to deform
along the direction of t.
FIG. 8 is a top view of spine 105, under an embodiment of the
invention. The top view corresponds to the orientation of spine
105, viewed from a direction of lateral side 221 when spine 105 is
inserted into first device slot 212. The spine 105 includes a
thickness, referred as width w.sub.l, and a length l.sub.l. The
spine 105 deforms to insert into first device slot 212, and then
expands to a relaxed position when inserted. Preferably, the
deformation and relaxation is in an orthanormal direction width w
and length l. However, some deformation may also occur along width
w, and even along length l.
FIG. 9 illustrates a construction of spine 105. A core 114 of
member 104 is formed from a rigid material, such as a metal. Due to
the dimensions of core 114, the rigid member is able to flex about
its lengthwise axis. Preferably, top and bottom end pieces 106, 108
are molded onto the member 104. In FIG. 9, top end piece 108 is
shown to be molded onto core 114. In a subsequent fabrication step,
a deformable layer may be clad onto core 104. For example, leather
or plastic cladding may be provided onto core 114 to enable spine
member 104 to deform along the thickness shown by w.sub.l.
In other embodiments, top and bottom end pieces 106, 108 may be
pressed on, rolled back metal, glued on etc. Still further, top and
bottom end pieces may be a unitary or integrated section of member
104.
FIG. 10 illustrates a cross-section of member 104 comprising core
114 clad with deformable layer 118. The member 104 is referenced
according to dimensions of width w.sub.l, and a thickness t. In an
embodiment, member 104 includes the core 114, formed from a rigid
material. Examples of rigid materials include metals such as tin,
aluminum, steel, and copper. More exotic elements may also be used
in other embodiments, such as for example, ceramics, carbon and
titanium. The deformable layer 118 is preferably formed from
resilient materials such as leather. Other suitable materials
include plastic, vinyl, rubber, fabric and composites. As shown in
FIG. 10, the deformable layer 118 preferably has the greatest
amount of deformity along the thickness t of the member 104. This
corresponds to how the structure of the device slot 212 engages
member 104 upon insertion. The thickness t of member 104 extends a
depth into the casing of the handheld computer 220. The width
w.sub.l extends laterally within first device slot 212, which in
the embodiments shown, corresponds to extending between front face
222 and backface 242 of the handheld computer 220 (See e.g. FIG.
13).
In other embodiments, spine 105 may be unitarily constructed. In
such embodiment, an exterior portion of member 104 may form
deformable layer 118. The material of spine 105 may include flexure
properties, and be sufficiently rigid along its thickness to allow
spine 105 to be insertable in and/or removable from device slot
212.
E. External Device Coupled To Handheld Computer
FIG. 11 is a sectional side-view of handheld computer 220, similar
to the perspective of FIG. 10, showing spine 105 inserted into
device slot 212. The first device slot 212 is formed by casing 260
and a subframe 252. The entrance 234 is formed in part by a contour
in the subframe 252 and/or casing 260, so that entrance 234 is a
recess formed into first lateral side 221. In this orientation,
cover portion 120 (now shown in this figure) may extend from first
device slot 212 through the exposed length 262 (See FIG. 5). As
shown, spine 105 is entered into device slot 212 along directional
arrow a, corresponding to an orientation where bottom end piece 106
(See FIG. 6) engages entrance 234 first. The enlarged top end piece
108 forms a stop at entrance 234. The core 114 of spine 105 is clad
with the deformable layer 118. The deformable layer 118 deforms as
the spine 105 is inserted into the device slot 212. In the example
shown, the deformation is primarily in the direction of the
thickness for the member 104, oriented vertically on the paper.
Furthermore, the deformation occurs at the portion of the spine 105
that extends past entrance 234 into the elongated section 233 of
the first device slot 212. The deformable layer 118 may remain
deformed to biasely retain spine 105 in the device slot 212. In the
embodiments, the device slot 212 may include a lip or wedge that
deforms the deformable layer 118 as it is inserted, but resists
removal of the spine 105 after insertion.
In an embodiment, entrance 234 of device slot 212 is a recessed
area of lateral side 221. FIG. 11 further illustrates that top end
piece 108 may be molded around a metallic element of spine 105,
specifically of a shaped end of member 104.
FIG. 12 is a sectional side view of handheld computer 220, showing
spine 105 partially inserted into first device slot 212. The
orientation shown is intended to be represent the spine 105
inserted into device slot 212, from the perspective of viewing the
cross-section from the front face 222 or the back face 224 of
handheld computer 200. As shown, first device slot 212 is formed
into a housing or casing 260 of handheld computer 220. The device
slot 212 includes exposed length 262 (see FIG. 5) on casing 260.
The spine 105 enters device slot 212 along directional arrow a, in
an orientation where bottom end piece 106 (See FIG. 7) engages
entrance 234 first. The top end piece 108 forms a stop at entrance
234. The spine includes core 114, clad with deformable layer 118.
The core 114 is formed from rigid materials, and dimensioned so as
to be flexible about its length.
The first device slot 212 is configured to receive and retain spine
105 from an angle so that spine 105 flexes when it is being
inserted. The first device slot 212 includes an interior structure
designed to support spine 105 when flexing. Preferably, the
interior structure prevents spine 105 from yielding when flexing to
enter first device slot 212. In an embodiment, first device slot
212 includes a plurality of discrete interior contact points that
contact spine 105 as it is being inserted. The discrete contact
points serve to support spine 105 from yielding during insertion.
This is conceptually illustrated by the parabolic curve of spine
105. Reference is made to first axis z1.
In one embodiment, a first contact point 241 contacts the spine 105
so as to support the spine 105 towards an outwardly direction
relative to the housing 260. Preferably, first contact point 241 is
positioned in entrance 234, proximate to top 227. A second contact
point 243 is positioned closer to the bottom 229 (FIG. 2), relative
to z1. The second contact point 243 supports spine 105 towards an
inward direction relative to housing 260. The second contact point
243 may be offset from the first contact point relative to lateral
side 221. A third contact point 245 supports spine 105 further
along first device slot 212. The third contact point 245 also
supports spine 105 inwardly relative to housing 260. A contact
region 247 confines an inserted portion of spine 105, limiting the
spine's flexibility at that stage.
In an embodiment, the distance between the first contact point 241
and the second contact point 243 is between 14-22 mm, and
preferably about 18-19 mm. The distance between the second contact
point 243 and the third contact point is between 6-12 mm, and
preferably about 9 mm. In addition, the first contact point 241 is
on or near lateral surface 221. The third contact point 245 is
between 1-4 mm a depth into the housing, and preferably a depth of
2 mm from the first contact point 241. The interior of first device
slot 212 is defined by a thickness of the casing 260. Preferably,
the thickness of casing 260 increases as from the second contact
point 243 to the third contact point 245. This forms an L-shaped
cross-section within first device slot 212. This cross-section
provides sufficient range of motion for spine 105, with contact
points 241, 243, and 245 positioned to support the spine 105 from
yielding.
The deformable layer 118 deforms in regions that are supported by
first contact point 241, second contact point 243, and third
contact point 245. The contact region 247 may also deform the
deformable layer 118. As a result, the interior structure of first
device slot 212 supports spine 105 from yielding, while
frictionally retaining spine 105 within first device slot 212.
FIG. 13 is a top view of handheld computer 220 with spine 105
inserted in device slot 212, under an embodiment of the invention.
A configuration of a device slot 212 and another insertable member
is shown in phantom to provide a relative comparison of an
advantage of the embodiment described. In particular, the
configuration of first device slot 212 and spine 105 allow for
accessory device 100 to cover a smaller-footprint on housing 260,
relative to devices using insertable members with circular
cross-sections.
In an embodiment, device slot 212 is C-shaped, including exposed
length 262 that extends vertically (into the paper) along the
lateral side 221. As such, device slot 212 is configured to receive
spine 105, having a rectangular cross-section. The first device
slot 212 may include exposed length 262, which enables for a body
to extend from spine 105, such as described with FIGS. 1 and 2.
This enables device slot 212 is to receive a T-shaped
cross-sectional member, formed by a combination of spine 105 and an
extended body (i.e. cover portion 120). Among other advantages, the
rectangular cross-section of spine 105 provides a greater resistive
force against separating from the device through exposed length
262, when compared to insertable members of known devices having
circular cross-sections.
In an embodiment, the exposed length 262 allows for flex portion
110 to acts as a hinge. The flex portion 110 enables cover portion
120 to flip between the front face 222 and back face 242 of
handheld computer 220. The flex portion 110 may be formed from a
tensile material such as leather, plastic, vinyl or rubber. The
tensile properties of the flex portion enables, for example, cover
portion 120 to flip between the front face 222 and the back face
242.
F. Examples and Alternative Embodiments
In an embodiment, core 114 of spine 105 is formed from steel. The
thickness of core 114 is sufficient to enable spine 105 to flex
lengthwise. The core 114 is clad with leather. The leather is
stitched to flex portion 110. Preferably, flex portion 110 and
cover portion 120 are also leather, and stitched, glued or other
wise attached to one another.
While embodiments described thus far have referred to the accessory
device as being an apparatus for providing a cover on the handheld
computer 220, other embodiments may include components, circuits,
and gadgets to extend functionality. For example, cover portion 120
may be equipped with folders and pockets, such as to provide for
business cards and pens. The cover portion 120 may also include
electronic components, such as global positioning components,
radio-frequency antennas, and other circuitry. Examples of such
accessory devices are disclosed in U.S. patent appl. Ser. No.
09/573,451, entitled "Electronic Encasement for a Handheld
Computer", filed May 16, 2000, naming Lunsford et al. as inventors;
U.S. patent appl. Ser. No. 09/586,541, entitled "Smart Cover for a
Handheld Computer", filed May 31, 2000, naming Canova, Jr. et al.
as inventors; U.S. patent appl. Ser. No. 09/451,630, entitled
"Cover for a Handheld Computer", filed Nov. 30, 1999, naming Han et
al. as inventors;
U.S. patent appl. Ser. No. 09/502,169, entitled "Encasement for
Handheld Computer", filed Feb. 11, 2000, naming Canova, Jr. et al.
as inventors; U.S. patent appl. No. 09/572,673, entitled "Keyboard
for a Handheld Computer", filed May 16, 2000, naming Lunsford et
al. as inventors; all of which are hereby incorporated by
reference.
Another embodiment of the invention includes a stylus housed with
the handheld computer. The stylus may be equipped with features of
spine 105, in a manner described with embodiments of the invention.
In a specific embodiment, a stylus includes an elongated member
having a length and a cross-section. The cross-section permits the
stylus to engage the device slot. The length enables the stylus to
be received and retained within the slot. A majority of the length
of the elongated member may include a deformable layer. As used
herein, majority refers to an amount greater than 50% of the whole.
The deformable layer deforms when the stylus engages the slot to
retain the stylus within the slot.
In another embodiment, cover portion 120 extends from spine 105
without a flex member 110. The cover portion 120 may be moveable
within device slot 212 to enable cover portion 120 to move between
the front face 222 and the back face 224 of handheld computer
100.
In still another embodiment, spine 105 may comprise the accessory
device, or alternatively form a detachable connection for other
components. For example, the spine 105 may have a connection to
couple to different types of other devices in a modular
fashion.
G. Conclusion
The foregoing description of various embodiments of the invention
has been presented for purposes of illustration and description. It
is not intended to limit the invention to the precise forms
disclosed. Many modifications and equivalent arrangements will be
apparent.
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